NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Homepage - IntroductionFinding listSelect element by name.Select element by atomic number.Select element from periodic tableHelium Atomic DataHelium Strong LinesHelium Neutral Atom Persistent LinesHelium Neutral Atom Energy LevelsHelium Singly Ionized Persistent LinesHelium Singly Ionized Energy LevelsHelium References
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Persistent Lines of Singly Ionized Helium ( He II )

  Intensity   Wavelength (Å)   Aki
(108s-1)
   Energy
Levels (cm -1 )
   Configurations   Terms   J   Line
Ref.
   Aki
Ref.
 
                          
  300  256.316626.77     0.00001s2S1/2MK00bBM00
   390142.56053p23/2  
         
  150  256.317726.77     0.00001s2S1/2MK00bBM00
   390140.82503p21/2  
         
 1000  303.7804100.27     0.00001s2S1/2MK00bBM00
   329185.15112p23/2  
         
  500  303.7858100.28     0.00001s2S1/2MK00bBM00
   329179.29402p21/2  
         
  120 1640.3321 8.624329179.29402p21/2MK00bBM00
   390142.55763d2D3/2  
         
   50 1640.3447 3.593329179.76232s2S1/2MK00bBM00
   390142.56053p23/2  
         
    7 1640.3750 0.337329179.29402p21/2MK00bBM00
   390140.96463s2S1/2  
         
   25 1640.3914 3.594329179.76232s2S1/2MK00bBM00
   390140.82503p21/2  
         
  180 1640.474210.35329185.15112p23/2MK00bBM00
   390143.13613d2D5/2  
         
   25 1640.4897 1.725329185.15112p23/2MK00bBM00
   390142.55763d2D3/2  
         
   15 1640.5326 0.674329185.15112p23/2MK00bBM00
   390140.96463s2S1/2  
         
    4 4685.3769 0.939390140.82503p21/2MK00bBM00
   411477.85374d2D3/2  
         
    3 4685.4072 0.491390140.96463s2S1/2MK00bBM00
   411477.85504p23/2  
         
   15* 4685.7038 2.060390142.55763d2D3/2MK00bBM00
   411478.09734f25/2  
         
   15* 4685.7044 1.126390142.56053p23/2MK00bBM00
   411478.09784d2D5/2  
         
   12 4685.8041 2.207390143.13613d2D5/2MK00bBM00
   411478.21934f27/2  
         


Homepage - IntroductionFinding listSelect element by name.Select element by atomic number.Select element from periodic tableHelium Atomic DataHelium Strong LinesHelium Neutral Atom Persistent LinesHelium Neutral Atom Energy LevelsHelium Singly Ionized Persistent LinesHelium Singly Ionized Energy LevelsHelium References
Switch to ASCII Version